Portion of a blade for a knife



FIG. 1 is an isometric view from the upper right front of a portion of a blade for a knife showing my new design, wherein the broken-line depiction of a handle associated therewith is included merely for illustrative purposes and forms no part of the claimed design;

FIG. 2 is a right side elevational view of the portion of a blade for a knife shown in FIG. 1 , the left side elevational view thereof being a mirror image of this view;

FIG. 3 is a top plan, or back, view thereof;

FIG. 4 is a bottom plan, or edge, view thereof;

FIG. 5 is a rear, or base, end elevational view thereof; and,

FIG. 6 is a front, or tip, end elevational view thereof. 

The ornamental design for a portion of a blade for a knife, as shown and described. 